iOS原生项目中嵌入Flutter

1. Xcode创建一个Swift项目Swift2FlutterDemo

2. 使用CocoaPods安装Flutter SDK

//初始化CocoaPods
pod init

3. 创建Flutter模块

flutter create --template module my_flutter

4. 编写Podfile文件

#添加模块所在的路径
flutter_application_path = './my_flutter'
load File.join(flutter_application_path, '.ios', 'Flutter', 'podhelper.rb')

target 'Swift2FlutterDemo' do
  # Comment the next line if you don't want to use dynamic frameworks
  use_frameworks!

  # Pods for Swift2FlutterDemo
  
  #安装Flutter模块
  install_all_flutter_pods(flutter_application_path)

end

post_install do |installer|
  flutter_post_install(installer)
end

5. CocoaPods安装依赖

pod install

6. 示例代码

import UIKit
// 导入Flutter
import Flutter

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    // 创建一个FlutterEngine对象
    lazy var flutterEngine = FlutterEngine(name: "FlutterEngine")
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 启动FlutterEngine
        flutterEngine.run()
        return true
    }
}

import UIKit
import Flutter

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        let button = UIButton(type: .custom)
        button.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
        button.backgroundColor = UIColor.red
        button.setTitle("跳转", for: .normal)
        button.addTarget(self, action: #selector(buttonClick), for: .touchUpInside)
        self.view.addSubview(button)
        
        
    }
    
    @objc func buttonClick() {
        
        let flutterEngine = (UIApplication.shared.delegate as! AppDelegate).flutterEngine
        let flutterViewController = FlutterViewController(engine: flutterEngine, nibName: nil, bundle: nil)
        self.present(flutterViewController, animated: true)
    }
}